Improvement in syringes



UNITED STATES PATENT OEEICE.

HAMILTON D. LOCKWOOD, OF OHARLESTOI/VN, MASSACHUSETTS.

IMPROVEMENT IN SYRINGES.

Specification forming part of Letters Patent No. 49,900, dated September12, 1865.

To cli whom it may concern:

Be it known that I, HAMILTON D. LocK- WOOD, of Charlestown, in thecounty ot' Middlesex and State of Massachusetts, have invented anImproved Syringe; and I do hereby declare that the following, taken inconnection with the drawings which accompany and form part of thisspecification, is a description ot my invention sufiicient to enablethose skilled in the art to practice it.

1n the manufacture of such elastic bulbsyringes, having iiexibleinduction and eduction pipes, as have the bulb arranged out of thegeneral line ot such respective pipes, the practice has been to connectthese pipes to each other and to the bulb by a T-shaped metalliccoupling. Such construction, however, is objectionable, because a series0i' joints is necessary, in each of which joints leakage isi more orlessliable to take place, which, in connection with the change in thecondition of the rubber around such joints, tends to rendertheinstrumentinefiicientandunreliable. This objectionable construction Iobviate to a great degree, if not entirely, by dispensing with themetallic coupling heretofore used and constructing the flexibleinduction and eduction pipes (made as one tube) with a ilexibleextension integral therewith, to which extension the elastic bulb isattached. It is this construction which constitutes my invention.

A syringe embodying the improvement is represented in elevation in thedrawings, the detail at A showing` the common construction.

c denotes the elastic bulb; b and c, the flexible induction and eductiontubes.

There being nothing new in the valvular arrangement or in the manner ofoperating the syringe, no description need be made thereof.

The induction and eduction tubes are made as one pipe, and have leadingfrom them wh ere theyjoin a short lateral tube, d, which is not anattachment to the induction and eduction pipes, but is a lateralextension of the line of tubing forming the said pipes. this pipe l isslipped over the neck of a nletallic socket-piece, e, which ispermanently7 attached at its other end to the bulb c, asin some othersyringes of this nature.

The advantage ot' this construction will be clearly seen from inspectionof the detail drawing, (seen at A,) which shows the common arrangement.It will be seen that there are three joints there besides the permanentconnection ofthe socket-piece to the bulb-namely, two for the attachmentof the eduction and induction pipes to the metallic connector and onefor the attachmentof the bulb to said connector--whereas by myconstruction only one ot' these joints is used-namely, that connectingthe eduction and induction pipes, or the integral extension therefrom,directly to the socket-piece c ot' the bulb.

I claim- An elastic bulb-syringe in which the eXible induction andeduction pipes are connected to the elastic bulb by a lateral pipeextending from and integral with said induction and eduction pipes,substantially as set forth.

In witness whereof I have hereunto set my hand this 30th day of May, A.D. 1865.

HAMILTON D. LOGKWOOD.

Witnesses:

FRANCIS GoULD, W. B. GLEAsoN.

The mouth of

